Dr. Ben Carson said he was "aghast" at the death of unarmed black man in South Carolina who was shot as he ran from the scene of a traffic stop. Carson called the death at the hands of a police officer an "execution."

"Probably like most reasonable people you're aghast," the possible Republican presidential candidate and world-renowned neurosurgeon told BuzzFeed News in an interview on Wednesday. "It's horrible to see an execution take place in the street like that."

Patrolman First Class Michael Slager, 33, is charged with the murder of 50-year-old Walter Scott. A video surfaced Tuesday showing Slager shooting Scott eight times in the back as Scott is running away. Slager pulled Scott over for a malfunctioning brake light.

"Certainly that policeman was too quick to do it," Carson added when asked if he thought police were too quick to shoot, particularly black men and boys. "I don't know if you can always generalize in a situation like that but certainly that officer was wrong."

Carson said the situation provided a good opportunity for police across the country to condemn the killing.

"I think it's so obvious that he was wrong that this provides an excellent opportunity for law enforcement personnel across the country to really come out and condemn this. And if they do that tells us a lot. And if they don't that tells us a lot."

Ilan Ben-Meir is a political reporter for BuzzFeed News and is based in New York.